Counter-balanced mobile device and crane

Abstract

A counter-balanced mobile device and a crane are provided. The counter-balanced mobile device comprises a counterweight rack (10), a connection assembly (20), a transmission assembly (30) and a driving member (40), wherein the counterweight rack (10) is configured to be connected with a turntable (100), and the connection assembly (20) is configured to be connected with a counterweight (200); and the connection assembly (20) is rotatably connected with the counterweight rack (10), the driving member (40) is fixed on the counterweight rack (10) and is connected with the connection assembly (20) by the transmission assembly (30) to drive the connection assembly (20) to rotate, so that the distance from the connection assembly (20) to a set reference on the counterweight rack (10) is adjusted. The counter-balanced mobile device can change the position of the counterweight (200) relative to the turntable (100) under the condition that the counterweight amount is unchanged, so that the counter-balancing performance and the stability of the crane are improved.

The invention claimed is: 
     
       1. A counter-balanced mobile device, comprising a counterweight rack, a connection assembly, a transmission assembly and a driving member, wherein the counterweight rack is connected with a turntable, the connection assembly is connected with a counterweight; the connection assembly is rotatably connected with the counterweight rack, the driving member is fixed on the counterweight rack and connected with the connection assembly through the transmission assembly, the driving member drives the connection assembly to rotate, so that the distance from the connection assembly to a set reference on the counterweight rack is adjusted, a swing rack is connected with the transmission assembly, a fixed part of a lifting oil cylinder is fixed on the swing rack, and a piston rod of the lifting oil cylinder moves in a vertical direction and is connected with the counterweight, the connection assembly comprises the swing rack; and the lifting oil cylinder; wherein the swing rack comprises a connecting portion and a mounting portion, the connecting portion is rotatably connected with the counterweight rack, the mounting portion is barrel-shaped, and the lifting oil cylinder is inserted into the mounting portion. 
     
     
       2. The counter-balanced mobile device according to  claim 1 , wherein the transmission assembly comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected with the counterweight rack, the other end of the first connecting rod is rotatably connected with one end of the second connecting rod, and the other end of the second connecting rod is rotatably connected with the connection assembly; and the driving member comprises the fixed part and a driving part, characterized in that the fixed part is fixed on the counterweight rack, the driving part can move linearly relative to the fixed part, and the driving part is connected with the first connecting rod. 
     
     
       3. The counter-balanced mobile device according to  claim 2 , wherein the driving member is an oil cylinder. 
     
     
       4. The counter-balanced mobile device according to  claim 1 , wherein the counterweight rack is arranged in a rectangular shape, one side of the counterweight rack is be connected with the turntable, and the connection assembly is rotatably connected with a side of the counterweight rack away from the turntable. 
     
     
       5. The counter-balanced mobile device according to  claim 4 , wherein the number of the connection assemblies is at least two. 
     
     
       6. The counter-balanced mobile device according to  claim 5 , wherein the number of the transmission assemblies and the number of the driving members are at least two, and the at least two connection assemblies, the at least two transmission assemblies and the at least two driving members are arranged in a one-to-one correspondence. 
     
     
       7. The counter-balanced mobile device according to  claim 6 , wherein the number of the connection assemblies is two, and the two connection assemblies are symmetrically and rotatably connected to the counterweight rack. 
     
     
       8. A crane comprising a frame, a turntable provided on the frame, and a counter-balanced mobile device according to  claim 1 , wherein the counterweight rack in the counter-balanced mobile device is connected with the turntable.